Razor blade sharpening machine



Nov. 6, 1934. E. G. GILSON RAZOR BLADE SHARPENING MACHINE Filed Aug. 24, 1-931 Fig.5.

Inventor": Emery G.Gilson, by r m His Au er-ne Patented Nov. 6, 1934 Lgig g'zfl.

UNETED STATES PATENT @FFEQE 1,979,970 RAZOR BLADE SHARPENING MACHINE Emery G. Gilson, Colonic, N. Y., assignor to General Electric Company, a corporation of New York Application August 24, 1931, Serial No. 558,902

18 Claims. (01. 51-80) The present invention relates to razor blade to facilitate positioning the razor blade thereon. sharpeners and more particularly to motor driven Each of the rolls is provided with spiral sharpsharpening machines. ening or stroppng means the material being It is one of the objects of the present invensuch as disclosed in the copending application '5 tion to provide a small, compact motor-driven of Fuller and Wyman, Serial No. 533,353, filed 69 sharpener. A further object of the invention is April 27, 1931, now Patent No. 1,923,719 entitled to provide a sharpener in which the motor oper- Stropping material and assigned to the Sam ation is controlled by the movement of the assignee as the present application. sharpening rolls. The lower rolls l1 and 13 are mounted for The novel features which are characteristic r tati n n at a y p Spindles and 65 of my invention are set forth with particularity 3 Suppo ted by extensions 11128 and 16 in the appended claims. The invention itself nt r 'w th C s A P Of pp y however will best be understood from reference po ed o s Casings and 13 are rotatto the following specification when considered ably mounted on the stationary pins 11' and in connection with the accompanying drawing 13' and p v d bearings the pp rollers 79 in which Fig. 1 represents a perspective view 12 and 1 respectively. of my improved machine; Fig. 2 is a view partly To prevent engagement of the upper rollers in cross section and partly in elevation taken with the razor blade at a point in the rear of the on the line 2-2 of Fig. 1; while Fig. 3 is a edge of the blade, the housings 17 and 18 are cross sectional view taken on the line 3-3 of each provided with a stop member 17 which 7 Fig. 1. engages the lug 16 on the casing 5 and limits the Referring more particularly to the drawing, rotary movement of each housing in one direc- I have indicated at 1 a single phase electric tion. The stop members 1'7 are positioned on motor comprising a field member or stator haveach housing to engage the lug 16 when the uping pole pieces 2 and 3 between which a squirrel per rollers are in a position to contact with the cage armature 4 is mounted for rotation. The edge portion of the blade to be sharpened. The motor also comprises a casing 5 constructed of cutting edge of a blade isground at a relatively brass, a phenol condensation product orany small angle and the blade is quite thin so that suitable material to which the stator member of the surface which must be operated on is very the motor is secured by means of a plurality of small. The stops 1'7 serve to insure engagement bolts 6. Casing 5 is provided with a closure of the rolls with this surface and prevent them member or base plate 7 which is removably riding up over the cutting edge and operating secured thereto. Motor 1 is also provided with on a portion of the blade other than the cutting an end plate 8 which may be held in position edge.

35 by the bolts 6 or supported in any suitable man- The oppositely disposed pairs of rollers are ner. The armature 4 is supported in a vertical connected together by gearing which is driven position by a thrust bearing 9 which is secured from motor 1 through a worm gear 19. The latwith the stator to casing 5. This arrangement ter gear is in constant engagement with worm greatly facilitates the assembly of the motor 1 wheels on rollers 11 and 13 respectively. By the within the casing 5 with common means for use of a worm gear 19 on the end of armature supporting the parts of the motor. The oppo- 4 with the gears 11' and 13 driven from opposite end of the motor armature shaft maybe site sides of the worm the speed reduction is provided with a bearing 29 which may be posiaccomplished with a gearing arrangement utiltioned either in another end plate or in the izing a minimum of space and material and at 45 casing 5 as indicated on the drawing. The posithe same time insuring uniform motion of the 1109 tioning of the bearing in the casing 5 serves to rolls 11 and 13 driven 'by gears 11" and 13'. locate the armature 4 in position with respect The'motor 1 is connected with a source of al- 130 the gears driven thereby W ut p c a prO- ternating current through a cable 20. The movision for aligning the parts. tor circuit is completed through two series conv A P Of p s 10 e tend upwardly from the nected switches 21 and 22 positioned within the Casi 5 a d Serve to position the blade to be motor casing. The lower contacts of the series sharpened between two oppositely disposed pairs switches are mounted on spring arms 23 and of sharpening rolls ll, 12, and 13, 14 mounted 24 respectively which tend to hold the switches at right angles to the motor armature shaft. closed. A pair of spring members positioned The pins 10 may be pointed at their upper ends above the spring arms 23 and 24. are provided with inverted U-shaped end portions 25 and 26 which extend through openings in the upper portion of the casing 5. The end plates 28 and 27 of the housings 17 and 18 have cam shaped lower end portions. The upper ends of the inverted U-shaped members engage the cam shaped portion on plates 27 and 28 and tend to maintain housings l7 and 18 in closed or normal operating position as indicated in Fig. 2, and also to maintain a desired pressure on the rolls. The inverted U-shaped portions 26 and 25 of the spring arms are located on the outside of the line of the centers of the rolls 11 and 12 and 13. and 14 respectively so that when the housings 17 and 18 are in the closedor normal operating positions the spring arms urge the rollers 12 and 14 to the operative position and so serve to maintain the desired pressure on the rolls to produce a sharpening action on the blade. As the housings 17 and 18 are moved to inoperative position, portions 26 and 25 ride up over the high points of the cam surfaces and so the spring arms also hold the housings in the inoperative position after they have been moved to that position.

One or both of the housings 17 or 18 may be rotated to a horizontal position in order to po' sition the blade to be sharpened on the pins 10. As the housings 18 and flare rotated to this position, the inverted U-shaped members 25 and 26 are actuated in a downward direction by the cam-shaped portions of the housings 18 and 17 thereby to engage spring arms 23 and 24 and open switches 21 and 22. When both housings 17 and 18 are rotated to a vertical position, the spring arms 23 and 24 move to the positions indicated in Fig. 2 and the series switches are permitted to close and thereby cause energization of the motor 1. The upper ends of the inverted U-shaped members at this time engage the cams on the housings 17 and 18 and maintain the latvter in the position indicated in Figs. 2 and 3.

When the motor has operated a sumcient length of time to sharpen the blade the housing 17 or 18 or both of them are rotated to a horizontal position to interrupt the motor circuit and to permit removal of the razor blade.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. A razor blade sharpening machine comprising a motor, a plurality of sharpening rolls mounted on said motor and driven therefrom, means to position a razor blade between said rolls, pivoted means supporting one of said rolls, and switching means actuated by said pivoted means for controlling the energization of said motor.

2. A razor blade sharpening machine comprising a motor, a pair of oppositely disposed pivoted housings mounted on said motor, sharpening rolls associated with each of said housings and driven from said motor, means to position a razor blade between said rolls, and switching means actuated by each of said pivoted housings to thereby control the energization of said motor.

3. A razor blade sharpening machine comprising a motor, sharpening rolls mounted on said motor and driven therefrom, means to posi-- tion a razor blade between said rolls, means for supporting and rotating one of said rolls about another of said rolls, spring means for maintaining said rolls in normal operating position, and switching means actuated by said pivoted means for controlling the energization of said motor,

4. A razor blade sharpening machine comprising a motor, a plurality of sharpening rolls mounted on said motor and driven therefrom, means to position a razor blade between said rolls, pivoted means for supporting one of said rolls, spring means for maintaining said rolls in normal operating position, and switching means actuated by said pivoted means for controlling the energization of said motor.

5. A razor blade sharpening machine comprising a motor having a driving shaft, a plurality of sharpening rolls mounted on said motor and at right angles to said driving shaft, means to position a razor blade between said rolls, gearing connecting said rolls and motor, a pivoted housing for one of said rolls, and means actuated by movement of said housing for controlling the'energization of said motor.

6. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of pivoted housings mounted on said casing on opposite sides of said driving shaft, a pair of sharpening rolls associated with each of said housings and connected for actuation from said driving shaft, means to position a razor blade between said rolls, spring means adapted to maintain said housings in normal operating position, and switching means adapted to be actuated by rotation of said housings to control the energization of said motor.

'7. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, gears carried by said rolls, means to position a razor blade between said rolls, housings pivoted on the axes of said rolls, a pair of sharpening rolls carried by said housings, gears carried by said last mentioned rolls and driven by the gears carried by said first mentioned rolls, and spring biased members engaging and urging said housings toward each other to the operative position.

8. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, cams secured to said housings and rotatable therewith, spring biased members engaging said cams and urging said housings to the operative position and switching means actuated by the movement of the pivoted housings to control the energization of the motor.

9. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, a cam secured to one of said housings and rotatable therewith, spring biased members engaging said cam and adapted to hold said housing in the operative position upon engagement with one portion of the cam and to hold said housing in the inoperative position upon engagement with. 2150 another portion of the cam, and switching means actuated by movement of the pivoted housings to control the energization of the motor.

10. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and" having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, a pair of contacts connected in the motor circuit biased to the closed position, and means to separate said contacts upon movement of one of said pivoted housings from the other of said housings to the inoperative position whereby the motor is deenergized.

11. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings and driven by said first mentioned rolls, means to position a razon blade between said rolls, two sets of contacts connected in series in the motor circuit and biased to the closed position, means to separate a set of contacts upon movement of one of said pivoted housings to the inoperative position, and means to separate the other set of contacts upon movement of the other of said pivoted housings to the inoperative position whereby the motor is deenergized by the movement of either one of the pivoted housings to the inoperative position.

12. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of pivoted housings mounted on said casing on opposite sides of said driving shaft, a pair of sharpening rolls mounted on said casing and driven by said driving shaft, a pair of sharpening rolls carried by said pivoted housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, cam shaped surfaces provided on the end of said pivoted housings, springs engaging said cam shaped surfaces and urging said pivoted housings toward each other to operative position, and switching means actuated by movement of one of the pivoted housings from the operative position to deenergize the motor.

13. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a bearing provided in the casing for the motor armature, a bearing for the other end of the motor armature secured with the motor in said casing, a worm gear secured to the driving shaft, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, gears secured to said rolls and in engagement with said worm gear, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings, and gears secured to said last mentioned rolls and in engagement with the gears on said first mentioned rolls.

14. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a worm gear secured to said driving shaft, a pair of sharpening rolls mounted on said casing on opposite sides of said driving spring biased members in engagement with said cam shaped surfaces, and switching means actuated by said spring biased members upon the movement of said pivoted housings apart to inoperative position to deenergize the motor.

15. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, cams secured to said housings and rotatable therewith, and spring biased members engaging said cams and urging said housings to the operative position.

16. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, housings pivoted about said rolls, a pair of sharpening rolls carried by said housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, a cam secured to one of said housings and rotatable therewith, and spring biased members engaging said cam and adapted tohold said housing in the operative position upon engagement with one portion of the cam and to hold said housing in the inoperative position upon engagement with another portion of the cam.

17. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a pair of pivoted housings mounted on said casing on opposite sides of said driving shaft, a pair of sharpening rolls mounted on said casing and driven by said driving shaft, a pair of sharpening rolls carried by said pivoted housings and driven by said first mentioned rolls, means to position a razor blade between said rolls, cam shaped surfaces provided on the end of said pivoted housings, and springs engaging said cam shaped surfaces and urging said pivoted housings toward each other to operative position.

18. A razor blade sharpening machine comprising a casing, a motor mounted within the casing and having a driving shaft extending therethrough, a worm gear secured to said driving shaft, a pair of sharpening rolls mounted on said casing on opposite sides of said driving shaft, spindles for said rolls, gears secured to said rolls and in engagement with the worm gear, housings pivoted on said spindles, a pair of sharpening rolls carried by said housings, means to position a razor blade between said rolls, gears secured to said rolls and in engagement with said first mentioned gears, cam shaped surfaces on one end of said housings, and spring biased members in engagement with said cam shaped surfaces urging said pivoted housings toward each other.

EMERY G. GILSON. 

